/**
 * OSAmI: Open Source Ambient Intelligence
 * Copyright (C) 2010 Bull S.A.S.
 * Contact: osami-general@osami-commons.org
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307
 * USA
 */

package org.osami.gateway.rules.heating.internal;

import org.osgi.framework.BundleContext;
import org.osgi.framework.InvalidSyntaxException;
import org.osgi.service.event.Event;
import org.osgi.service.event.EventAdmin;
import org.osgi.util.tracker.ServiceTracker;

/**
 * A {@code EventAdminProxy} is ...
 *
 * @author Guillaume Sauthier
 */
public class EventAdminProxy implements EventAdmin {

    private ServiceTracker tracker;

    public EventAdminProxy(BundleContext bundleContext) {
        tracker = new ServiceTracker(bundleContext, EventAdmin.class.getName(), null);
    }

    public void start() throws InvalidSyntaxException {
        tracker.open();
    }

    public void stop() {
        tracker.close();
    }

    private EventAdmin findEventAdmin() {
        return (EventAdmin) tracker.getService();
    }

    public void postEvent(Event event) {
        EventAdmin ea = findEventAdmin();
        if (ea != null) {
            ea.postEvent(event);
        } // no-op
    }

    public void sendEvent(Event event) {
        EventAdmin ea = findEventAdmin();
        if (ea != null) {
            ea.sendEvent(event);
        } // no-op
    }

}
